panic: mtx 0xffffffff838dae30: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *463289 10155 32767 0x10 0x4000000 1 syz-executor 44113 45452 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e7467) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838dae30) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff838dae30) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80083d1340) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80083d1340) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80083d1340) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8067dc3be0,1000,ffff80003c4206e8,ffff80003c4206cc,0,2,3b207dd870d1bc6d,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c420900,ffff80003c420938,ffff80003c420780,ffff80003c420768) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c420900,ffff80003c420938,ffff80003c420880) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806be657b0,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 kpageflttrap(ffff80003c420ab0,200000001680) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80003c420ab0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 end trace frame: 0xffff80003c420cd0, count: 0 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: mtx 0xffffffff838dae30: locking against myself ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e7467) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838dae30) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff838dae30) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80083d1340) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80083d1340) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80083d1340) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8067dc3be0,1000,ffff80003c4206e8,ffff80003c4206cc,0,2,3b207dd870d1bc6d,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c420900,ffff80003c420938,ffff80003c420780,ffff80003c420768) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c420900,ffff80003c420938,ffff80003c420880) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806be657b0,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 kpageflttrap(ffff80003c420ab0,200000001680) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80003c420ab0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 syscall(ffff80003c420ce0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c420ce0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa73a596cb40, count: -16 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c420430 rbx 0xffff8000299dedcf rdx 0 rcx 0xffff800039406ff8 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x8d074385a4af3917 r11 0xffed3fd74ec415d6 r12 0xffff8000299debd0 r13 0 r14 0 r15 0x1 rip 0xffffffff823cdcc5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c420420 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=463289 pid=10155 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=36, usrpri=75, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800039406d50,0xffff800039407aa8 process=0xffff8000fffec4e0 user=0xffff80003c41b000, vmspace=0xfffffd806be657b0 estcpu=25, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10155 232924 92695 32767 3 0x10 fltagain2 syz-executor 10155 127113 92695 32767 3 0x4000090 fsleep syz-executor *10155 463289 92695 32767 7 0x4000010 syz-executor 10155 130612 92695 32767 3 0x4000010 uobjlk syz-executor 45452 44113 68024 32767 7 0x10 syz-executor 45452 416035 68024 32767 3 0x4000090 fsleep syz-executor 67428 201131 83339 32767 3 0x90 nanoslp syz-executor 67428 192145 83339 32767 3 0x4000090 kqsel syz-executor 67428 99009 83339 32767 3 0x4000090 kqsel syz-executor 36577 235565 0 0 3 0x14200 bored sosplice 16283 44982 4915 32767 3 0x90 nanoslp syz-executor 66135 36629 27750 32767 3 0x90 nanoslp syz-executor 8138 208864 81525 32767 3 0x90 nanoslp syz-executor 2841 153977 9780 32767 3 0x90 piperd syz-executor 83339 266016 43006 32767 3 0x90 nanoslp syz-executor 68024 239974 1566 32767 3 0x90 nanoslp syz-executor 92695 398834 54195 32767 3 0x90 nanoslp syz-executor 9780 127201 48398 0 3 0x82 wait syz-executor 54195 135536 48398 0 3 0x82 wait syz-executor 1566 363978 48398 0 3 0x82 wait syz-executor 81525 67722 48398 0 3 0x82 wait syz-executor 43006 236982 48398 0 3 0x82 wait syz-executor 4915 17586 48398 0 3 0x82 wait syz-executor 27750 517771 48398 0 3 0x82 wait syz-executor 48398 128097 43321 0 3 0x82 nanoslp syz-executor 43321 59024 96873 0 3 0x10008a sigsusp ksh 96873 16199 7628 0 3 0x98 kqread sshd-session 7628 433598 41343 0 3 0x92 kqread sshd-session 1840 512737 1 0 3 0x100083 ttyin getty 41343 362983 1 0 3 0x88 kqread sshd 93502 247116 9034 73 3 0x1100090 kqread syslogd 9034 383110 1 0 3 0x100082 sbwait syslogd 32946 317813 1 0 3 0x100080 kqread resolvd 44970 328514 78742 77 3 0x100092 kqread dhcpleased 21248 133343 78742 77 3 0x100092 kqread dhcpleased 78742 68746 1 0 3 0x80 kqread dhcpleased 21801 23121 0 0 3 0x14200 bored smr 69552 231666 0 0 2 0x14200 zerothread 88161 181295 0 0 3 0x14200 aiodoned aiodoned 70396 362168 0 0 3 0x14200 syncer update 26580 448536 0 0 3 0x14200 cleaner cleaner 2233 203867 0 0 3 0x14200 reaper reaper 17746 231297 0 0 3 0x14200 pgdaemon pagedaemon 30558 337409 0 0 3 0x14200 bored viomb 13606 230565 0 0 3 0x40014200 acpi0 acpi0 32057 458091 0 0 3 0x40014200 idle1 10899 51993 0 0 3 0x14200 bored softnet3 91882 51807 0 0 3 0x14200 bored softnet2 19954 267745 0 0 3 0x14200 bored softnet1 11736 291461 0 0 3 0x14200 bored softnet0 73212 151387 0 0 3 0x14200 bored systqmp 95238 297628 0 0 3 0x14200 bored systq 27821 25632 0 0 3 0x14200 tmoslp softclockmp 62415 259210 0 0 3 0x40014200 tmoslp softclock 98813 311531 0 0 3 0x40014200 idle0 1 348430 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff838dae40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #8 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #9 alltraps_kern_meltdown+0x7b #10 copyout+0x57 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #12 Xsyscall+0x128 Process 10155 (syz-executor) thread 0xffff800039406d50 (127113) exclusive rrwlock inode r = 0 (0xfffffd806cb61d00) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_ftruncate+0x1c4 sys/kern/vfs_syscalls.c:2912 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 Process 10155 (syz-executor) thread 0xffff800039406ff8 (463289) exclusive rwlock uobjlk r = 0 (0xfffffd806bf0d610) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 uvn_io+0x667 sys/uvm/uvm_vnode.c:1297 #3 uvn_get+0x31d sys/uvm/uvm_vnode.c:1102 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #8 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #9 alltraps_kern_meltdown+0x7b #10 copyout+0x57 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #12 Xsyscall+0x128 exclusive rwlock fdlock r = 0 (0xffff800039404ca8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 sys_socketpair+0x2f5 sys/kern/uipc_syscalls.c:-1 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #4 Xsyscall+0x128 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff838dae40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvn_get+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #8 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #9 alltraps_kern_meltdown+0x7b #10 copyout+0x57 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #12 Xsyscall+0x128 Process 10155 (syz-executor) thread 0xffff800039407a98 (130612) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff839f58d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:579 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10180 10951K 10965K 166960K 11260 0 pcb 17 12K 12K 166960K 17 0 rtable 216 6K 7K 166960K 360 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 3 1K 1K 166960K 3 0 counters 62 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 34 0 iov 0 0K 16K 166960K 43 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1394 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 22 81K 125K 166960K 252 0 proc 58 79K 127K 166960K 491 0 subproc 63 3K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 16 0 in_multi 88 6K 7K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 369 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 240 151K 178K 166960K 3884 0 UVM aobj 8 3K 3K 166960K 9 0 pinsyscall 43 86K 114K 166960K 1309 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 10 0K 2K 166960K 27 0 temp 38 8683K 8763K 166960K 4719 0 kqueue 13 20K 26K 166960K 37 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 43 0 40 1 0 1 1 0 8 0 rtentry 176 113 0 12 6 0 6 6 0 8 0 unpcb 144 180 0 160 4 0 4 4 0 8 3 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpqe 32 3 0 3 1 0 1 1 0 8 1 tcpcb 808 72 0 62 4 0 4 4 0 8 2 arp 128 18 0 2 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 384 211 0 197 5 0 5 5 0 8 3 nd6 144 26 0 3 1 0 1 1 0 8 0 kcovpl 48 12 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 457 0 44 29 0 29 29 0 8 1 art_table 32 458 0 44 4 0 4 4 0 8 0 art_node 16 112 0 20 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semapl 112 10 0 3 1 0 1 1 0 8 0 shmpl 112 6 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1690 0 180 95 0 95 95 0 8 0 ffsino 288 1690 0 180 109 0 109 109 0 8 0 nchpl 144 2008 0 325 63 0 63 63 0 8 0 uvmvnodes 80 1807 0 0 37 0 37 37 0 8 0 vnodes 216 1807 0 0 101 0 101 101 0 8 0 namei 1024 6097 0 6097 1 0 1 1 0 8 1 percpumem 16 47 0 1 1 0 1 1 0 8 0 kstatmem 264 22 0 2 2 0 2 2 0 8 0 scxspl 216 6587 0 6587 3 1 2 2 1 8 2 plimitpl 152 53 0 29 2 0 2 2 0 8 0 sigapl 424 532 0 479 8 0 8 8 0 8 1 futexpl 64 1442 0 1440 1 0 1 1 0 8 0 knotepl 120 302 0 0 10 0 10 10 0 8 0 kqueuepl 224 44 0 33 1 0 1 1 0 8 0 pipepl 336 156 0 129 3 0 3 3 0 8 0 fdescpl 520 513 0 479 4 0 4 4 0 8 0 filepl 160 2121 0 1916 12 0 12 12 0 8 2 lockfpl 104 26 0 23 1 0 1 1 0 8 0 lockfspl 48 14 0 11 1 0 1 1 0 8 0 sessionpl 144 30 0 15 1 0 1 1 0 8 0 pgrppl 48 46 0 24 1 0 1 1 0 8 0 ucredpl 104 186 0 168 1 0 1 1 0 8 0 zombiepl 144 482 0 479 1 0 1 1 0 8 0 processpl 1216 532 0 479 5 0 5 5 0 8 0 procpl 680 712 0 653 7 0 7 7 0 8 0 sockpl 728 436 0 399 9 0 9 9 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1184 0 0 74 0 74 74 0 8 0 bufpl 280 2486 0 117 170 0 170 170 0 8 0 anonpl 32 5326 0 0 43 0 43 43 0 246 0 amapchunkpl 152 11631 0 11097 30 0 30 30 0 158 3 amappl16 200 2275 0 2256 5 1 4 5 0 8 2 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 114 0 104 1 0 1 1 0 8 0 amappl13 176 8 0 7 1 0 1 1 0 8 0 amappl12 168 1132 0 1098 2 0 2 2 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 239 0 239 1 1 0 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 102 0 92 1 0 1 1 0 8 0 amappl6 120 180 0 176 1 0 1 1 0 8 0 amappl5 112 132 0 126 1 0 1 1 0 8 0 amappl4 104 306 0 290 1 0 1 1 0 8 0 amappl3 96 1928 0 1805 4 0 4 4 0 8 0 amappl2 88 649 0 596 2 0 2 2 0 8 0 amappl1 80 9593 0 9029 15 0 15 15 0 8 0 amappl 88 3179 0 3002 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 8 0 1 1 0 1 1 0 8 0 uaddrrnd 24 513 0 479 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 513 0 479 1 0 1 1 0 8 0 vmmpekpl 168 6424 0 6387 2 0 2 2 0 8 0 vmmpepl 168 40922 0 38923 103 0 103 103 0 357 8 vmsppl 480 512 0 479 7 1 6 6 0 8 0 rwobjpl 72 16401 0 13762 50 1 49 49 0 8 0 pdppl 4096 1033 0 958 111 26 85 97 0 8 10 pvpl 32 10917 0 0 90 1 89 89 0 265 0 pmappl 256 512 0 479 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 465 0 29 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83856ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff839f56c8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839f56c8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:840 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839f56c8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839f56c8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003c42c8e0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42c8e0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71c2e6bb8de0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff83856ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff839f56c8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839f56c8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:840 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839f56c8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839f56c8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003c42c8e0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42c8e0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71c2e6bb8de0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e7467) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838dae30) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff838dae30) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80083d1340) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80083d1340) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80083d1340) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8067dc3be0,1000,ffff80003c4206e8,ffff80003c4206cc,0,2,3b207dd870d1bc6d,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c420900,ffff80003c420938,ffff80003c420780,ffff80003c420768) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c420900,ffff80003c420938,ffff80003c420880) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806be657b0,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 kpageflttrap(ffff80003c420ab0,200000001680) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80003c420ab0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 end trace frame: 0xffff80003c420cd0, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e7467) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838dae30) at mtx_enter_try+0x1bf sys/kern/kern_lock.c:271 mtx_enter(ffffffff838dae30) at mtx_enter+0x60 sys/kern/kern_lock.c:239 uvm_pageclean(fffffd80083d1340) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80083d1340) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80083d1340) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8067dc3be0,1000,ffff80003c4206e8,ffff80003c4206cc,0,2,3b207dd870d1bc6d,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c420900,ffff80003c420938,ffff80003c420780,ffff80003c420768) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c420900,ffff80003c420938,ffff80003c420880) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806be657b0,200000001000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 kpageflttrap(ffff80003c420ab0,200000001680) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80003c420ab0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 syscall(ffff80003c420ce0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c420ce0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa73a596cb40, count: -16